Next to Minimal Flavor Violation
Kaustubh Agashe, Michele Papucci, Gilad Perez, Dan Pirjol

TL;DR
The paper explores the Next to Minimal Flavor Violation (NMFV) framework, where new physics couples mainly to third-generation quarks, allowing sizable flavor violation effects at TeV scales while evading current experimental bounds.
Contribution
It introduces the NMFV framework, showing it accommodates sizable new physics contributions to flavor processes without conflicting with existing constraints.
Findings
NMFV models allow ~40% new physics contributions to Delta F=2 processes.
B-factories only beginning to constrain NMFV models.
Correlating Delta F=2 and Delta F=1 processes is effective for probing NMFV.
Abstract
The flavor structure of a wide class of models, denoted as next to minimal flavor violation (NMFV), is considered. In the NMFV framework, new physics (NP), which is required for stabilization of the electroweak symmetry breaking (EWSB) scale, naturally couples (dominantly) to the third generation quarks and is quasi-aligned with the Yukawa matrices. Consequently, new sources of flavor and CP violation are present in the theory, mediated by a low scale of few TeV. However, in spite of the low flavor scale, the most severe bounds on the scale of NP are evaded since these are related to flavor violation in the first two generations. Instead, one typically finds that the NP contributions are comparable in size to SM loop processes. We argue that, in spite of the successful SM unitary triangle fit and contrary to the common lore, such a sizable contribution to Delta F=2 processes of ~ 40%…
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Neutrino Physics Research · Computational Physics and Python Applications
